---
title: "Tungsten (7440-33-7): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/tungsten-7440-33-7/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/tungsten-7440-33-7/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/tungsten-7440-33-7/
---

Hazard search

# Tungsten

CAS number

7440-33-7

Also known as

Tungsten & compounds (insoluble) (as W) · Tungsten & compounds (soluble) (as W) · Tungsten & insoluble compounds (as W) & others · Tungsten & soluble compounds (as W) · Tungsten (Elements by Cellulosic Internal Capsule Sampler) · Tungsten (Elements by ICP Aqua Regia Ashing) · Tungsten (Elements by ICP HNO3/HClO4 Ashing) · Tungsten insoluble · W

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 1/5 mg/m³ |  |
| 15-minute STEL | 3/10 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 91/2** / Metals & metalloids by XRF (non quantitative) / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs91-2.pdf) | Active (pump) | IOM with 0.8µm MCE filter | XRF | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |
| **NIOSH 7074** / Tungsten (soluble and insoluble) by AA-F / [Method document (opens in a new tab)](http://dl.mozh.org/NIOSH/nioshdbs/docs/2003-154/pdfs/7074.pdf) | Active (pump) | 0.8µm MCE filter in 37mm cassette | AA-F | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **NIOSH 7300** / Elements by ICP (Nitric/perchloric acid ashing) / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/7300.pdf) | Active (pump) | 0.8µm MCE filter in 37mm cassette | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **NIOSH 7301** / Elements by ICP (Aqua regia ashing) / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/7301.pdf) | Active (pump) | 0.8µm MCE filter or 5µm PVC filter in 37mm cassette | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-803](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-803) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **NIOSH 7306** / Elements by Cellulosic Internal Capsule Sampler ICP -AES / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2014-151/pdfs/methods/7306.pdf) | Active (pump) | Solu-CAP MCE Filters Preloaded in Cassettes and Cassette Holder | ICP-AES | [225-8517](https://analyt-mtc.com/catalog/product/cassette-inserts/#part-225-8517) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **OSHA ID 213** | Active (pump) |  | ICP | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) / [225-24](https://analyt-mtc.com/catalog/product/smear-tabs/#part-225-24) |
| **OSHA ID-213** / Tungsten & Cobalt by ICP -AES / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-id213.pdf) | Active (pump) | 0.8µm MCE filter in 37mm cassette |  | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **BS ISO 15202-1:2020** / Metals and Metalloids by ICP -AES / [Method document (opens in a new tab)](https://shop.bsigroup.com/ProductDetail?pid=000000000030383009) | Active (pump) | IOM with 0.8µm MCE filter |  | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |

Methods and limits as published by their agencies and summarised by SKC; check the current method and the limit that applies to you before sampling.

Source: [SKC Ltd (UK), Hazard Search, used with SKC's permission (opens in a new tab)](https://www.skcltd.com/hazard-search.html); [SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)](https://international.skcinc.com/sampling-guides/)